To be honest, I just didn't have a clue what sweet the lick meant. I thought maybe it should be sweat the lick, but still didn't understand, so I had to google it.
It's the bit where the dojo sensai wants his star pupil to put Daniel out of the tournament thus showing no mercy.
I kind of want us to do similar and go all out to win every game.
Sweep the leg. Stop getting Karate Kid wrong!